PC won't do anything more for your busa than your stock ECU with a TEKA box tune. We tried those things on our race bikes and finally trashed them. TEKA box tune works just fine. The PC is piggy backed onto your ECU and fools it into thinking it's doing something it's not.
It's no different than running a program within a program on your computer. It works, but it slows the entire process down.
PC and TRE are both advertised as a whole lot of bark but have little or no bite!